±800kV直流输电线路重冰区导、地线脱冰冲击敏感因素浅析.

Superficial Discuss on Deicing Impact Sensitivity Factors of Conductor Wire and Earth Wire in Heavy Icing Areas of ± 800 kV DC Transmission Line

摘要:

结合实际工程±800kV直流输电线路重冰区的工程数据，基于脱冰数值计算理论，通过数值方法模拟了六分裂导线在不同档数、档距、高差等因素复合影响下导线的脱冰动力响应过程，分析不同参数条件下导线和地线脱冰对悬垂绝缘子串和耐张绝缘串的冲击效应，得到最不利脱冰冲击效应的控制因素。研究表明：不同档距和高差组合下，档距和高差均最大时，脱冰后的冲击效应最强；对于连续档，不同档脱冰时，对其相邻档导地线串的冲击效应最大；脱冰水平冲击效应主要受水平档距的影响，垂直冲击效应主要受高差的影响。

Abstract:

Combined with the engineering data of ± 800 kV DC transmission line in heavy icing areas, and based on the theory of deicing numerical calculation, the dynamic response process of six bundle conductor under the combined effect of different span, span length and height difference is simulated by numerical method. The impact effect of conductor wire and earth wire deicing on suspension insulator string and tension insulator string under different parameters is analyzed, and the most unfavorable control factors of deicing impact effect are obtained. The results show that: under different combinations of span and height difference, the impact effect after deicing is the strongest when the span and height difference are the largest; for continuous gear, the impact effect of different gear on the conductor string of adjacent gear is the largest; the horizontal impact effect of deicing is mainly affected by the horizontal span, and the vertical impact effect is mainly affected by the height difference.